Last year I posted this thread, now I let you know more. The IS137 (carbon 2013) is a great board, no regret I sold FU141. With 9,2 / 7.8 very fast and more effective when lulls, planing, cruising etc. I also sold my FU122 and bought an old IS122 (wood 2008). The IS122 has less volume but is very fast and good control etc. I don't think the IS137 and IS122 have to much overlap, for me it works well. So I am happy with change to IS ! Of course FU are also still great boards ...